Form for concrete structures and particularly concrete catch basin units



April l, 1969 TADAo NAKAHARA 3,43051 FORM FOR CONCRETE STRUCTURES AND PARTIGULARLY CONCRETE CATCH BASIN UNITS l Filed Sept. 19. 1966 Sheet @5 ha? 54 a April 1. 1969 MDA@ NAKAHARA 35,436,051

FORM FOR CONCRETE STRUCTURES AND PARTlCULARLY CONCRETE CATCH BASIN UNlTS adao Nam/mm `I N VEN TOR April 1969 TAD/xo NAKAHARA KASOSl FORM FOR CONCRETE STRUCTURES AND PARTlCUl-IARLY CONCRETE CATCH BASIN ums Filed sept. 19. 196e sheet 5 @f 5 Fig..9

April 1, 1969 TADAO NAKAHARA 353436,@5

FORM FOR CONCRETE STRUCTURES AND PARTlCULARLY CONCRETE CATCH BASIN UNlTS Filed sept. 19. 196e snee@ of Fig. /Z I3 3 'I faz Fig. /6 Q2 @fifa INVENTQR.

plll l, 1969 TADAO NAKAHARA 3,436,051

FORM FOR CONCRETE STRUCTURES AND PARTICULARLY CONCRETE CATCH BASIN UNITS Filed sept. 19. 196e sheet 5 of 5 336 Fig. /7 54 [IFSI adao NUM/7am IN VE N T0 R.

United States Patent O 3,436,051 FORM FOR CONCRETE STRUCTURES AND PAR- TICULARLY CONCRETE CATCH BASIN UNITS Tadao Nakahara, 47-137 Kam Highway, Kaneohe, Hawaii 96744 Filed Sept. 19, 1966, Ser. No. 580,220 Int. Cl. B29c 1 00 U.S. Cl. 249-1 18 Claims ABSTRACT OF THE DISCLOSURE This invention generally appertains to improvements in forms for molding cementitious -material in order to produce various concrete bodies and more particularly relates to novel improvements in form constructions for use in casting a concrete catch basin and similar structure in situ.

The provision of forms for catch basins for sewers is known but such conventional forms are very expensive and complicated so as to enable such to be erected in situ and then dismantled and used again and again for forming other concrete catch basins. On the other hand, the other type of known form for the mold into which cementitious material is poured to produce the wall structures of the catch basin is erected in situ from lumber, which is haphazardly connected together, thereby necessitating a considerable amount of working time by skilled laborers and resulting in the creation of concrete catch basins, which will vary and which may not meet the rigid specifications of engineering divisions of departments of public works.

Accordingly, an important object of the present invention is to provide a simple, compact and extremely inexpensive form construction for use in casting an integral concrete catch basin unit in situ, the form construction being easily erected by even unskilled laborers and being so constructed that each concrete catch basin unit will be of identical formation and will result in the formation of a concrete catch basin unit that will meet the specifications or requirements of engineering division of departments of public works.

Another important object of the present invention is to provide a form construction which may be easily and quickly erected in situ to produce the mold for pouring the concrete walls of the vertical basin and then for forming the walls of a lateral trough-like wing of the catch basin unit, the wing being in communication with the upper end portion of the catch basin, and then for forming, with the concrete walls of the catch basin and the wing being employed as supporting means, a decking for the catch basin and the wing, the decking closing off the lateral trough-like wing and the catch basin and having a free side edge portion creating an inflow opening for the wing and the catch basin in relation to a gutter.

Another important object of the present invention is to provide a sturdy, compact and inexpensive form construction for use in casting a hollow concrete body having angularly related side walls and, more particularly, for casting such body in a vertically orientated position.

A still further important object of the present invention Patented Apr. 1, 1969 ICC is to provide a form construction for use in constructing catch basins, manholes or any such similar structures in a more efficient, less costly and less time-consuming way than the customary methods of construction and to provide a form construction which simplifies the method of molding or casting such structures and which is reusable for an indefinite number of times and is extremely accurate, so that each formed structure will be identical and will be formed so as to Imeet the rigid specifications of any public works engineering division.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

FIGURE l is a perspective View of a catch basin, which has been constructed by using the form construction of the present invention;

FIGURE 2 is a vertical, cross-sectional view, taken substantially on line 2 2 of FIGURE 1;

FIGURE 3 is a longitudinal, vertical sectional view taken substantially on line 3 3 of FIGURE 2;

FIGURE 4 is a longitudinal, horizontal sectional View, taken substantially on line 4 4 of FIGURE 3, with FIGURES 2 4 showing the interior structural details of the catch basin, which is shown exteriorly in the perspective view of FIGURE l;

FIGURE 5 is a perspective view of the portion of the overall form construction, which portion is used to form the catch basin;

FIGURE 6 is a side elevational view of the form unit of FIGURE 5;

FIGURE 7 is a front elevational view of the form unit of FIGURES 5 and 6;

FIGURE 8 is an enlarged fragmentany perspective View, showing an interlocking arrangement between the assembly and supporting bars of the wall forming panels of the outer form means of the form unit of FIGURES 5 through 7;

FIGURE 9 is a detailed sectional view, taken substantially on line 9 9 of FIGURE 7 and showing the structural relationship between the outer form means and the inner form means, which constitute the form unit of FIGURES 5 and 6, such form unit being used to cast or mold the catch basin;

FIGURE 10 is a vertical, cross-sectional view of the form unit, showing in detail the structural relationship between the outer form means and the inner form means of the form unit of FIGURE 5;

FIGURE 1l is a fragmentary, detailed perspective view, showing the interlocking arrangement between the supporting and anchoring bars for the panels of the inner form means of the form unit of FIGURE 5;

FIGURE l2 is a top plan view of the form unit used to cast or form the lateral trough-like wing, after the catch basin has been poured or cast by using the form unit of FIGURE 5;

FIGURE 13 is a vertical cross-sectional view, taken substantially on line 13 13 of FIGURE 12;

FIGURE 14 is a detailed, cross-sectional view, taken substantially on line 14 14 of FIGURE 13, and showing the interlocking arrangement between the complemental sections of the trough casting form unit of FIGURES 12 and 13;

FIGURE 15 is a perspective view of a structural member, which is interposed at the outer external corner of the form unit of FIGURE 12 so as to create an opening, which is filled with cementitious material when the decking for the catch basin and lateral wing is formed;

FIGURE 16 is a fragmentary, detailed perspective view of an interlocking arrangement between the outer ends of the supporting bars for the outer sides of the form unit for forming the side walls of the wing;

FIGURE 17 is a vertical sectional View of the formed catch basin and lateral wing and showing, mainly in elevation and partly in section, the form means for the pouring of the decking, which overlies the catch basin and the wing as a one-piece slab and which is integral with the walls of the catch basin and wing, the form unit for forming the decking being supported by the previously cast walls of the catch basin and lateral wing, as shown in FIGURE 16;

FIGURE 18 is a vertical, cross-sectional view, illustrating in further detail the form means for forming the decking and the free side edge portion thereof which creates an inflow opening for the trough-like wing and catch basin in relation to a gutter;

FIGURE 19 is a perspective view of a structural component which is utilized, in structural association with the form unit of FIGURE 5, for supporting the rungs, when the walls of the catch basin are being poured, as shown in FIGURE FIGURE 20 is a perspective view of a portion of the supporting means, which is used in structural conjunction with the anchored rungs so as to support part of the form unit for the decking, as shown in FIGURE 18;

FIGURE 21 is a fragmentary, front elevational view of the form unit for the decking, showing the portion of the form unit for forming the free side edge 4or curve portion of the decking which creates an inflow opening to the wing and catch basin in relation to a gutter;

FIGURE 22 is a detailed, vertical, cross-sectional View, taken substantially on line 22-22 of FIGURE 21, and,

FIGURE 23 is a vertical, cross-sectional view, taken substantially on line 23-23 of FIGURE 21.

Referring now more particularly to the drawings and initially to FIGURES 1-4 for a general description of the catch basin unit 10, it is to be understood that the speciiically illustrated catch basin unit 10, as shown in FIG- URES 1-4, is merely exemplary of a catch basin unit or other structure formed from cementitious or plastic material and which is formed in situ by using a form construction in accordance with the present invention.

The catch basin unit 10 comprises a catch basin 12, Which is vertically disposed within the ground G and which is composed of a vertical front wall 14 and a rearwardly spaced, rear wall 16, the walls being integral with opposing side walls 18 and 20. The catch basin further comprises a bottom wall 22 and a top wall 24, the latter being formed with a manhole opening 26, which is adapted to be closed off by a removable manhole cover 28.

The front wall 14 of the catch basin is formed, at its lower end portion and immediately above the inner surface 22a of the bottom wall 22 with a circular opening 30 within which one end of a pipe 32 is secured.

The side wall 18 is formed at its lower end, adjacent the rear wall 16, with a circular opening 34 within which the end of a pipe 36 is lixedly seated, while the opposing side wall 20 is formed with a larger circular opening 38, adjacent the rear wall 16 and at the upper surface 22a of the bottom wall 22 and in substantial alignment with the opening 34 in the opposing side wall 18. A pipe 40 has its inner end xed within the side wall opening 38.

The rear wall 16 is provided with a plurality of rungs 42, which are anchored in the rear wall and are disposed in vertically spaced relationship, the rungs being provlded so that, with the manhole cover 28 removed, workmen can descend into the catch basin to clean or repair the same.

A trough-like wing 44 is cast separately, as the second step in the process of pouring or forming the catch basin unit 10, but is integral with the associated walls of the catch basin 12. The lateral wing 44 includes a bottom wall 46 which has its upper surface sloping downwardly toward the catch basin, the lateral wing being in tfree, open cornnunication with the upper end portion of the catch basln,

as shown in FIGURE 3. The lateral wing is further com posed of a Vertical end wall 48, which opposes the open end of the trough-like wing and opposing, perpendicularly disposed, laterally spaced and longitudinally extending front and rear walls 5t) and 52, respectively. The front Wall 50 of the wing is integral with the front wall 14 of the catch basin, while the end of the rear wall 52 of the wing as integral with the side wall 18 of the catch basin, as shown in FIGURE 4.

A decking 54 overlies the top of the trough and catch basin and is in the form of a one-piece slab, a portion of which forms the top wall 24 of the catch basin and a portion of which forms the top wall 56 of the trough, as shown in FIGURES 1 and 3. The decking 154 is formed with a free side edge portion 58, which, in the instance of the catch basin construction of FIGURE 1, constitutes the curbing edge of the decking. The free side edge portion 58 creates an inflow opening 60 for surface water on the pavement 62 and is in ilow relation with a gutter ilow area 64, as shown in FIGURE l. The gutter ow area 64 has opposing end transition gutter portions 64a and 64b, which extend beyond the side edge 58 of the decking 54 and are in communication with the central depresed gutter portion 64C, which is in free ilow communication, through the flow opening 60, with the lateral wing 44 and with the catch basin 12.

The catch basin wing 44 is installed to favor upstream of gutter flow and receives the upstream flow, through the inflow opening 60, with the gutter being in free communication with the catch basin, the latter also being in communication, through the inflow opening 60, with the depressed central gutter portion 64C, as can be realized from a consideration of FIGURES 1 and 2.

The rst step in the formation of the catch basin unit 10 involves the construction of the catch basin 12 by the utilization of a form, generally designated by the reference numeral 66, which is shown in FIGURES 5 thruogh 11.

With reference to such figures of the drawings, the form 66 comprises an outer form means 68 and an inner form means 70, the form means 68 and '70 being disposed in the previously dug out opening in the ground G, with the pay lines of the opening being spaced a considerable lateral distance from the outer surfaces of the outer form means 68. The inner form means 70 is spaced laterally inwardly from the outer form means 68 and the lateral zone or space 72 therebetween is adapted to be lled with cementitious material so as to produce the integrally cast walls of the catch basin 12, as shown in FIGURES 1 through 4 and aforedescribed.

The outer form means 68 is composed of side panels held in xed angular relationship in accordance with the cross-sectional coniiguration of the catch basin 12, so that the outer form means 68 is composed of structurally related and interconnected sides 14a, 16a, 18a, and 20a.

Each of the sides, as for example the side 16a, which is shown inl FIGURE 5, is composed of a number of panels 74 which are positioned in side by side, abutting and coplanar relationship and which are fastened or held together in such wall forming relationship by releasable `interconnecting means 76, such means being transversely disposed in substantially horizontal positions on the outer surfaces of the vertically orientated panels 74. The means 76, as shown in greater detail in FIGURES 5 through 8, comprises an angle iron 78 which has its vertical flange 80 provided with a series of longitudinally spaced, transverse openings or apertures 82. The tiange 80 is fixedly superimposed on the outer surfaces of the panels 74 by utilization of the apertures 82.

In the instance, where the panels 74 are formed from lumber, then nails or the like type fasteners would be driven through the apertures 82 and into the panels 74 so as to releasably fix the flange 80 of the angle iron 78 on the outer surfaces of the panels. In the event that the panels 74 are formed from metallic or similar material, then the apertures 82 are adapted to recetve bolt assemblies, whereby the flanges 80 of the angle iron 78 are secured to the outer surfaces of the vertically orientated panels 74 and span the outside of the panels, in transverse relationship and in horizontal positions, so as to connect the abutting side edges of the panels 74 securely together.

The angle irons 78, which are fastened fby fastening means, utilizing the apertures 82 as afore described, are xed to the panels of the Walls 14a, and 16a, as shown in FIGURES 5 and 7, so that the lateral flanges 84 project laterally outwardly from the upper edges of the vertical flanges 80, as shown in FIGURE 6. The angle irons 78 are secured to the walls 14a and 16a in veitically spaced relationship and the angle irons on the opposing walls 14a and 16a lie in substantially the same horizontal, vertically spaced apart planes, as shown in FIGURE 6.

The opposing sides 18a and 20a are provided with angle irons 78a, as shown in FIGURE 6 in connection with the side 20a. The angle irons 7 8a have their vertical sides 80a fastened to the panels 74, which make up the sides, in the same manner as the angle irons 78 are attached to the panels 74 but the outwardly projecting, lateral anges 84a of the angle irons 78a extend outwardly from the lower edges of the vertical sides 78a so that the flanges 84a overlap the anges 84 of the complementary angle irons 78.

The angle irons 78a have their horizontal, laterally outstanding flanges 84a provided with end portions which overlap the end portions of the horizontal flanges 84 of the angle irons 78 and the overlapping anges 84 and 84a are provided with integral, adjustable self-locking means, as shown in detail in FIGURE 8.

With respect to FIGURE 8, it can be seen that the flanges 84 of the angle irons 88 are formed at their outer end portions with integral upstanding rigid pins 86, which are adapted to extend through complemental apertures 88 formed in the horizontal flanges 84a of the overlying end portions of the angle irons 78a. The pins 86 are formed in longitudinally spaced fashion on the ange 84 and the apertures 88 are provided in the flange 84a in a related spaced fashion.

As shown in FIGURES 5 and 10, the lower end edges of the structurally related and interconnected walls 14a, 16a, 18m and 20a, are seated on the bottom B of the dug out opening for the catch basin 12 and the outer form means 66 is fixed, against shifting movement on the bottom B by means of ground anchored stakes 90, which hold bottom bars 92 tightly against the outer surfaces of the lower edge portions of the structurally related and interconnected walls of the outer form means 66.

Provision is made for the reception of the pipes or conduits 32, 36 and 40 for anchoring in their related anchored positions in the walls 14, 18 and 20 of the catch basin, as shown in FIGURE 4. The means is structurally related with the walls 14a, 18a and 20a and is the same, in each instance, only differing insofar as the external diameter of the conduits or pipes varies.

In this respect, as shown in FIGURES 6 and 7, bulkhead arrangements 94 are structurally provided on the walls 14a, 18a and 20a in proper relationship with the walls so as to receive and support the ends of the pipes, whereby the ends extend inwardly of the outer form means and are disposed within the space 72, as shown clearly in FIGURES 9 and 10.

The bulkhead means 94 comprises a series of plates 96, which are fastened to the panels of the walls, the walls having openings for receiving the ends of the conduits or pipes. The plates have inner arcuate edges 98, which are struck on the same radius and are related so as to form an annular or circular opening 100` for snugly and tightly receiving the ends of the pipes, as shown in FIGURE 6.

The inner form means 70', as shown more particularly in FIGURES 9 through 11, is composed of walls 14b, 16b, 18b and 2Gb, such walls being spaced inwardly and being complemental to their associated walls 14a, 16a, 18a and 20a of the outer form means 68.

Each `of the walls of the inner form means 70 is composed of vertically orientated panels 102, which are assembled in side by side, abutting coplanar relationship, as shown in FIGURE 9. The panels of each of the sides are secured together in such relationship by crossbars 104, which are in the form of angle irons, with the Vertical anges 106 of the angle irons xedly attached to the inner surfaces of the panels 102 by virtue of fasteners disposed through transverse apertures l108 in the vertical flanges 106 in a manner similar to the provision and arrangement of the apertures 82 and the fastening, by Virtue of the apertures 82, of the angle irons 78 and 78a on the outer surfaces of the walls of the outer form means 68. The inner form means 72 further comprises tubular corner posts or juncture elements 110. The inner corners of the tubular corner posts 110, which are substantially square in cross-section, are cut out so as to receive the adjoining, overlapping ends 112 and 114 of adjoining side bars 104 on the insides of the walls of the inner form means 70, as shown in detail in FIGURE ll. In this respect, the end portions 112 and 1,14 of the angle irons extend beyond their angularly related walls, as shown in FIG- URE l1 and are free from attachment to the associated walls so that the end portions 112 and 114 are adapted to be removably fitted in interlocked and overlapped relationship in a locking structure or socket means 116 formed on the inner corners of each of the corner posts 110.

The locking means 1|16 comprises angularly related plates l118 and 120 having lower end portions secured, as by welding 122 or other suitable fastening means, to the inner corners of the corner posts The xed or anchored lower end portions of the plates have upper shoulders 124. The plates have free, upwardly projecting end portions 118a and 120m, which are spaced outwardly from and project above the shoulders 124. The Vertical flanges of the projecting ends 112 and 114 of the angle irons are adapted to fit behind the projecting portions 118:1 and 120x, which act as anchoring lugs or ears, with the lower edges of the projecting vertical anges seated on the shoulders 124. The projecting or free ends of the horizontal flanges are in overlapped relation, as shown in FIGURE ll.

It is to be understood that the crossbars 104, which are in the form of angle irons, are attached to the inner surfaces of the panels 102 of each of the walls of the inner form means in horizontal positions, transversely spanning the panels 102 and being releasably xed or fastened thereto and that the bars are disposed in a vertically spaced relation, such as the arrangement of the angle irons on the outer surfaces of the panels of the outer form means 66, as shown in FIGURE 5. It is also to be understood that the bars have projecting free ends at each of the corner posts 110` and that each of the corner posts 110 is provided with a locking means 116, as shown in detail in FIGURE 11. This can be appreciated from a consideration of FIGURE 10.

The walls of the inner form means 70` have upper edges on which angle irons 126 and complemental angle irons 128 are fixed, so that the horizontal flanges of the angle irons are in overlapping relation and are held together, at their overlapping ends, above the corner posts 110 by a pin arrangement 130.

The panels 74 of the walls of the outer form means 66 are provided with coplanar upper edges 74a and the junctures between the abutting edges of the panels are spanned by U-shaped resilient clips 132, the clips serving to hold the upper ends of the panels in straight line disposition, as shown in FIGURE 9.

Means is provided for securing the inner form means 70 in a fixed relationship with the outer form means 66, so that the walls of the inner form means are positively disposed in the proper lateral spacement from the associated walls of the outer form means 66. fEach of the lateral spacing means 134, as shown in FIGURES 9 and 10, comprises a rigid rod 136 which is laterally disposed between the walls of the inner form means 70 and the associated and complementary walls of the outer form means 66. The rods 136 are disposed at the upper end portions of the walls and are positioned laterally therebetween. Each of the rods 136 is composed of a main portion 138, which has a flat enlargement or foot 140 formed on its inner end and adapted to bear against the outer surface of the walls of the inner form means 70, adjacent the upper ends of the panels thereof. The opposing or outer end of the main portion 138 of each rod 136 is formed with an upstanding extension 142, which terminates in an integral hook 144 that is adapted to be tted or hooked over the upper edges 74a of the panels of the walls of the outer form means The spacing rods 136 are thus hooked onto the upper edges 74a of the panels of the walls of the outer form means 66 at spaced points and the lateral or main portion 138 of the rods positively hold the walls of the inner form means 70 in inwardly spaced, lateral relationship With the inner surfaces of the walls of the outer form means 66, with the foot 140 of each of the rods bearing iirmly against the outer surfaces of the Awalls of the inner form means 70, adjacent the upper ,ends thereof. The rods are provided to firmly center and support the walls of the inner form means 70 -within the anchored walls of the outer form means 66, the walls of the outer form means 66 being held by the stakes 90. The portions 138 of the rods are of a length equal to the desired width of the spacing 72 or, stated otherwise, the thickness of the concrete walls of the basin or other structure.

The lower or bottom end edges 146 of the walls of the inner form means 70 are provided with inner and outer,

complemental angle irons 148 and 150, respectively. The thusly enclosed lower ends of the walls of the inner form means 70 rest on concrete blocks 152, the blocks sitting on the bottom B of the dug out hole or opening along with the bottom ends of the walls of the outer form means 66, as shown in FIGURE l0. The concrete support blocks 152 space the walls of the inner form means 70 upwardly above the lower edge portions of the walls of the outer form means 66, whereby when the cementitious material is poured in the space 72, it will ow beneath the floor 154, which is carried by the angle irons and which is structurally associated with the walls of the inner form means 70. In this manner, the bottom wall 22 of the catch basin is formed along with the front, rear and opposing side Walls of the catch basin, which are formed by the pouring of the cementitious material in the lateral space or zone 72 between the confronting and complemental =walls of the inner and outer form means, 70 and 66, respectively.

Means is provided for supporting the rungs 42 in proper positions, with respect to the wall 16h of the inner form means 70. In this respect, as shown in FIGURE l0, the rungs have opposing leg portions 42a, the free end portions of which project through suitable openings in the wall 16a of the inner form means 70 and are disposed horizontally within the space 72 between the wall 16b of the inner form means 70 and the spaced and associated wall 16a of the outer form means 66, whereby the ends will be anchored in the set or cured concrete wall 16. The rungs are attached to the wall 16b by an attaching means 154, as shown in FIGURES and 19. The rung supporting means 154 is formed from a blank of sheet material, such as sheet metal or the like, and comprises a generally U-shaped at body portion 156, which is provided with transverse apertures 158 to receive nails or similar fasteners 160, whereby the body portion is xedly superimposed on the inner surface of the centermost panel of the wall 16b. The legs of the body portion are formed with outstanding projections 162 and 164, the leg projections 162 and 164 being generally horizonally disposed and being related in converging relationship and connected at their outer ends by an angular flange 166, which includes a vertical section 166a and a horizontal inwardly directed otfset section 16611. An apertured ear 168 is rlixed on the ange 166b and overlies the connecting web portion 17) between the outer ends of the arm projections 162 and 164 in a channel-like forming manner. The fweb or bight portion 42b of each of the rungs is adapted to be disposed between the horizontally disposed and spaced confronting end portion 170 and apertured ear 168 and a pin 172 is passed through the aperture in the ear to lock the bight portion 42b of the rung within the channel-like support, the lower end of the shank of the pin fitting behind the rear edge of the end connecting portion 170. Thus, the bight portions 42b of the rungs are spaced outwardly from the wall 16b While the outermost or free end portions of the opposing legs 42a are disposed within the space 72 so that they will be anchored in the Wall 16 and the rungs will be disposed in fixed relation to the wall 16, as shown in FIGURE 2.

The space 72 between the inner form means and the outer form means 68 is filled with reinforcing rods 174, that are vertically orientated and cooperative reinforcing rods 176, which are horizontally orientated, the rods being interconnected in suitable fashion, as shown in FIG- URES 9 and 10, so that the walls of the basin are reinforced by the reinforcing rods 174 and 176 which occupy a substantially centrally disposed position within the lateral free space or zone 72 between the inner form means 70 and the outer form means 68 and which also are disposed horizontally in the bottom space 72a beneath the inner form means 70, so that the bottom and all of the side walls of the basin 12 are reinforced.

As shown in FIGURES 2 through 4, the trough-like wing 44 is in free communication with the basin at the upper end of the wall 18. In order to establish such communication, a bulkhead 178 is securely fitted between the Walls 18a and 18b in the space 72 and is held in position by a vertically disposed key means 180, which is carried by the wall 18b and removably supports the bulkhead 178, which, as shown in FIGURE lO, will completely occupy the space between the walls 18a of the outer form means 68 and -wall 18b of the inner form means 70. Thus, when the cementitious material is poured into the space 72, the bulkhead 178 will create the necessary communieating opening 18a in the upper forward corner sections of the side wall 18.

A bulkhead 182, which is in the form of a solid block is disposed at the corner of the space 72 at the juncture of the walls 14a and 20a of the outer form means 68 and the bulkhead 182 is fitted at the corner, as shown in 'FIG- URE 9, so that when the cementitious material is poured into the space or zone 72, a vertical opening will be created in the set Walls 14 and 20, which opening will be lled with cementitious material when the decking slab 54 is poured, so that the slab will be integrated with the basin.

After the bottom wall, front and back and opposing side walls of the basin are poured and formed and the walls have become cured or set, the outer form means 68 is removed and the inner form means 70 is removed, with the supporting means 154 for the rungs being lfirst removed from the inner form means 70 before the inner form means is dismantled and removed. This leaves the walls of the basin w-ith the ends of the pipes or conduits 32, 36 and 40 in set positions in the walls, as shown in 'FIGURE 4.

The next step in the process of forming the catch basin unit 10 involves the pouring of the Walls for the troughlike wing 44. For this purpose, the wing form means or wing form unit 184, as shown in FIGURES 12 through 16, is structurally associated with the set walls 14 and 18.

The wing form unit 184 comprises outer walls 186 and 18S, which may be formed from plywood or similar material or may be formed from metal, such as sheet metal. The plates 186 and 188 are at, so that they have inner flat surfaces 18651 and 188a. The plates are inclined inwardly and downwardly toward the basin and the ground is excavated so as to create an opening 190 which extends laterally from the wall 1'8 of the basin and which is sloped toward the basin. The lower edges 186k and 18811 of the side plates 186 and 188 rest on the bottom of the opening 190 and are secured in perpendicular p0- sitions by means of ground engaging stakes 192, which are secured by fasteners 194 to the outer surfaces of the plates and embedded in the ground. In assembly, the stakes 192 are driven into the ground and then the side plates 186 and 188 are vertically orientated alongside the inner surfaces of the stakes and the plates are attached to the stakes by the fasteners 194. In the construction shown in FIGURE 13, the plates 186 and 188 are formed from plywood or similar lumber, so that the fasteners 194 are -in the form of nails that are driven into the side plates 1186 and 188. However, in the instance where the plates 186 and 188 are formed from sheet metal, for example, then 'bolt assemblies would be used, in lieu of the nails 194, so as to fasten the plates 186 and 188 to the ground anchoring stakes 192, whereby the plates can be disposed in perpendicular positions and spaced laterally apart, dependent upon the overall width or cross-sectional area of the trough-like wing 44.

The plates 186 and 188 constitute with an end plate 196 the outer form means 198 of the wing form unit 184.

As shown in FIGURES 13 and 16, the side plates 186 and 188 are provided at their upper end portions with elongated bars 198, the bars being fixed to the outer surfaces of the upper edge portions of the plates by suitable fasteners 200 and the bars extending longitudinally of the plates and having rearwardly extending free prolongations or end portions 202. The projecting end portions 202 are adapted to flt Ain vertical slots 4 formed in the opposing ends of the vertical flange 206 of an angle iron 208, which is secured to the outer surface of the upper edge portion of the rear plate 196, as shown in FIGURE 16. The vertical flange 206 of the angle iron 208 is formed with apertures 210 for the reception of fasteners, either nail or bolt assemblies, depending upon the material nature of the plate 196, whereby the angle iron is removably secured to the upper edge portion of the plate 196 on its outer surface. The projections 200 fit in the slots 204 formed vertically in the extending portions of the vertical flange 286 of the angle iron with the horizontal flanged side 212 overhanging and resting on the top edge of the extending end portions 202 of each of the side bars 198. This provides an interlocking means between the side plates 186 and 188 and the end plate '196, as clearly shown in FIGURE 16.

The trough-like Wing form unit 184 further includes an inner form means 214, as shown in FIGURES 12 through 14. The inner form means 21'4 is composed of a sectional channel form 216 that is constituted by complemental, longitudinally extending sections 218 and 220. Each of the sections 218 and 220 comprises an elongated side wall 222, with the side walls being spaced inwardly and 'being disposed in confronting, spaced relation to the plates 186 and 188. Each side Wall 2-22 has an inturned bottom wall 224, which terminates at its inner side edge in an upstanding inturned flanged edge 226. The side walls 228 and 222 have' integr-al, right angularly related rear walls 228 and 230, as shown `in lFIGURE 13.

The space between `the inturned inner edges 226- of the bottom walls 224 of each of the side sections is filled with an elongated, tapered filler wedge or plug 234, as shown in FIGURE 13. Each of the side sections is rigidified yby a triangular brace bar means 236, as shown in FIGURE 13, whereby the side walls 220 and 222 and associated bottom walls of the sectional channel-like inner form means 214 are rigidified.

The end walls 228 and 238 are secured together by a locking means 238, as shown in FIGURES `13 and 14.

As shown in FIGURE 14, the rear walls 228 and 230 of each of the sections of the lchannel-like inner form means 214, are formed with inwardly extending flanges 240 and 242, the flanges being disposed in spread apart or diverging relation and terminating at their inner ends in lateral end flanges 244 and 24'6, which are substantially coplanar. A wedge-shaped plug 248, which is preferably made from wood, is fitted between the faces of the confronting flanges '240 and 2142 and has an outer surface 250, which is coplanar with the outer surfaces of the rear walls 228 and 230 and has a front face 252, which is coplanar with the front faces or surfaces of the flanges 244 and 246. Locking straps 254 are disposed transversely of the face 252 of the vertically disposed block 248 and the flanges 244 and 246. Each of the straps 254 terminates at its opposing ends in laterally offset hook-like flanges 256 and 258. The center portion of each of the straps is formed with an aperture 260 to receive the shank 262 of a bolt which has its head 264 fitted in the counterbored outer end of a bore 266 formed through the block 248. The threaded extending end p0rtion of the shank receives a lock-ing nut 268, whereby the straps are releasably clamped onto the flanges 244 and 2:46 so that the end walls 228 and 230 of the sections of the channel-like inner form means '214 of the wing are clamped securely together.

A bulkhead 182b, which is identical to the bulkhead 182 is disposed at the outer corner of the wing form unit 184, as shown in FIGURE l2, with the bulkhead 182]), as shown in FIGURE 15, being in the nature of a rectangular block, which may be tubular, but which has a right angular cutout or recessed corner portion 183, identical to the construction of the bulkhead 182. The bulkhead 182b is deposed vertically in the space between the outer side plate 188 and the rear plate 196 and the adjoining corner of the section of the longitudinally split or sectional channel-like inner form means 214. The bulkhead 182b serves the same purpose as the bulkhead 182 but in relation with the formed wall 50 of the wing.

Means is provided for spacing the side walls 220 and 222 of the inner forming channel-like form unit 214 from the side plates 186 and 188 and for supporting the inner form section 214 in a positive raised position above the ground level, whereby the side walls 50 and 52 of the wing and the bottom wall 46 are formed in an exact and accurate manner, along with the formation of the end wall 48.

As shown in detail in FIGURES 12 and 13, the spaci ing and fixing means comprises several or at least one strap bar 272, which is disposed transversely of the plates 186 and 188 and rests on the upper edges thereof and has downturned flanged edge portions 274 and 276 that clampingly engage the bars 198, as shown in FIGURE 13. In this regard, it must be borne in mind that the plates 186 and 188 are fixed in stabilized and secure vertical positions by virtue of the anchoring stakes 192.

The side walls 220 and 222 of the sections of the inner form means 214 for the trough-like wing 44 have inwardly rolled or flanged upper longitudinally extending edges 278 and 280 and the strap 272 carries rotatable pins 282, which have laterally offset lower ends 284 on their shank portions 286, the pins being held in place by enlarged heads 288. By rotating the pins, which is done by either gripping the heads 288 with the fingers or with a suitable tool, the Shanks can be rotated so as to` move the offset lower ends 284 into hooking relation with the inturned flanged upper edge portions 278 and 280, as shown in FIGURE 13, whereby the inner form means 214 is suspended from the straps and the side walls 220 and 222 are positioned at the proper distance, laterally speaking, of the side plates 186 and 188 and the bottom walls 224 are disposed above the bottom of the ground opening. The lateral spaces between the side wall 220 and the outer plate 188 and between the side wall 222 and the complemental outer plate 186 and between the end plate 196 and the rear walls 228 and 230 of the sectional channel-like inner form means 214 and the space between the bottom walls 224 and the bottom of the opening 190 can be filled with cementitious material so as to form the side Walls 50 and 52 and the end wall 48 of the wing and the bottom wall 46 thereof.

As shown in FIGURE 12, the inner forming means 214 is extended through the opening in the wall 18, created by virtue of the provision of the bulkhead 178, so that when the cementitious material is poured into the spaces between the outer plates and the inner forming means 214, the material is prevented from entering the opening in the side wall 18 of the catch basin.

After the appurtenant walls of the wing have been set, it can be appreciated that the Walls will be integral with the walls of the catch basin 12 so that the catch basin 12 and the lateral trough-like wing 44 will be an integral unit, though cast in two separate steps with different form means.

The final step in the construction of the catch basin unit involves the forming of the decking 54, which is in the nature of a single concrete slab that serves as the top wall for the catch basin and the lateral wing and which is provided with the free curve edge portion 58, as afore described and as shown in FIGURE 1. In this regard, attention is directed to FIGURES 17, 18 and 20. It must be realized that the front, rear and side walls of the catch basin and the side walls and rear wall of the wing have been formed, so that they terminate below the level L of the ground, as can be appreciated in considering FIGURE 3, so that the decking 54 is formed Ion the upper edges of such Walls, which edges lie below the ground level L and the decking is formed so that the upper surface thereof is level with the ground level L, the decking being formed as a slab within the ground G.

Bearing this in mind, attention is direction to FIG- URES 17 and 18, wherein the form means 290 for the construction of the single slab decking 54 is illustrated. The form means 290 comprises a at plate 292, which is of substantial L-shaped configuration, corresponding to the planar configuration or outline of the decking, as shown in FIGURE l. The plate 292 is disposed within the formed Walls of the catch basin 12 and the wing 44 and is positioned, substantially at the formed upper ends of the walls, as shown in FIGURE 17. Supporting means 294 is provided in association with the anchored rungs 42 for supporting the plate at the rear wall 16. The supporting means 294, as shown in FIGURES 17, 18 and 20, comprises a wooden 2 by 4 or bar 296, which has opposing end portions to which upstanding supporting legs 298 and 300 are fixed by fasteners 302. The upper ends of the legs 298 and 300 are fastened to an elongated bar 304 by fasteners 306. The bar 304 extends the full width of the rear wall 16 and crossbars 308 and 310 have their ends in abutting relation with the bar 304 and seated in cutout portions or notches 312 formed in the upper ends of the legs 298 and 300. The legs 298 and 300 are supported by means of one of the rungs, for example the rung 42', as shown in FIGURE 17 Thus, as shown in FIGURE 20, the bar 296 is formed intermediate its ends with blocks 314 and 318 secured by fasteners 320 on the outer face of the bar and disposed in spaced apart relation, along the length of the bar 296. The inner confronting faces of the blocks are formed with notches or cutout portions 322 to embracingly receive the leg portions 42a of the rung 42 and a wedge 324 is adapted to be driven between the bight portion 42b of the rung 42 and the front face of the vertical leg or brace 326, which is similar to the legs 298 and 300, but which is disposed between the bar 296 and interposed between the leg portions 42a of the rung 42 and the blocks 314 and 318 on the crossbar 296 that supports the legs 298, 300 and 326.

Accordingly, by virtue of the wedge locking arrangement of the crossbar and center leg 326 with the rung 12 42', the legs for the horizontal bar 344 are supported by the rung 42'.

As shown in FIGURES 17 and 18, a supporting leg 328 is provided with a wedge-shaped foot 330 seated on the bottom surface 46a of the bottom wall 46 of the trough and having an upper end provided with -a cutout 332 to support a crossbar 334, which parallels the bar 304. The bars 304 and 334 extend lengthwise and underlie the plate 292, While the bars 308 and 310 extend crosswise, the crossbar 308 constituting one end bar While the other end bar is constituted by the crossbar 336 land the crossbars being supported by the rear bar 306 and a partially extending rear bar 338, which is parallel with the bar 304 and supported thereby through the crossb-ar 306 that extends from the bar 304 to the longitudinally extending bar 338 in the wing 44. The leg 328 is braced by a brace bar 340 that extends from the guttering edge 342.

Thus, the slab form means 290 is essentially comprised of the flat plate 292 which is supported in a horizontal position, as shown in FIGURE 17, by the arrangement of longitudinally extending and transversely extending bars, the bars being disposed in positions so that the plate rests thereon `and the bars being supported by the rung 42' land by the inner surface 46a of the bottom wall 46 of the wing and by the curve edge of the pavement, as shown in FIGURES 17 and l18.

As afore described, in connection with :the description of the catch basin unit 10 of FIGURE 1, the decking is formed with a free side edge portion `58 creating an inflow opening 60 in relation to the gutter 64 in the pavement.

Thus, as shown in FIGURE 18 and in more detail in FIGURES 21-23, the crossbars have outer tapered or inclined bottom edge portions l344, which rest on an elongated bar 346 that is seated on the adjoining portion of the Icentral gutter section 64C. This assists in holding the plate 292 in a firm horizontal position.

IThe free gutter edge 58 of the decking 54 is formed with a form plate 348, which includes a ilat section 350 that rests on top of the plate 292 and is inclined upwardly and outwardly therefrom and which has an upwardly and outwardly inclined outer end portion 352 that terminates in a vertical plate extension 354, the plate extension 354 having its upper edge formed with a downwardly inclined ange 356, which terminates in a depending lip 358.

The plate arrangement 1348 is supported by jack means 360, as shown in FIGURES 18 and 23. The jack means 360 includes tubular sleeves or housings 362, which are carried by the front faces of the walls 354 and are closed at their upper ends by the ange 356, the lower end of the tubular housing being closed off by an apertured end wall 364, the end Wall 364 being formed with a plain central apenture 366 which slidably receives the screw rod 36S. The screw rod 368 is provided with a supporting foot 370 and a nut 372 is threaded on the screw rod and has radially extending hand-gripping portions 374, whereby the nut may be manually manipulated to adjust the position of the plate 348 for the formation of the free edge or curve edge 58 of the decking 54.

As shown in FIGURE 22, the plate arrangement 348 is held in place by a brace arm 376, which is secured by pins 378 and which is provided with an angular bar 380 that is reversible and is provided to hold the chamfer member 382 in place, the same being an integral part of the curve edge by virtue of pins 384 embedded in the decking, during the formation thereof.

After the decking has been poured and the upper surface has been smoothed off, in the conventional manner, the framework support for the supporting plate 292 can be easily removed.

With respect to the formation of the decking 54, it is to be realized that the manhole frame 26 .is formed by seating the manhole frame and manhole cover in proper position on the supporting plate 292, during the pouring and treating of the decking slab 54. After the slab 54 has set, the curve edge support construction, as shown in FIGURES 211-23 can be removed and the crossbar supports and the associated framework of the form means 290 can be removed by physically entering the catch basin 12 through the manhole opening in the decking. The bars are removed through the manhole while the plate 292 can be passed out through the opening 60.

It can thus be appreciated that the catch basin unit is formed in three simple steps by virtue of three simple, functionally and structurally correlated form means.

The first step involves the erection of the inner and outer forming means 68 and 70 of the form construction 66 for forming the walls of the catch basin 12. The next step involves the erection of the form means 184, after removal of the form means 66, so that the form means 184, which is utilized to pour the walls of the wing, can be structurally associated with the formed walls of the catch basin. The third and final step involves the erection of the supporting framework for the plate 292 and the erection of the curving edge form in relation to the plate 292, so that the decking slab 54 can be poured and formed on top of the upper edges of the walls of the catch basin and trough, with the catch basin and trough being used as support means for the framework of the form means 29-0 for forming `the one piece decking slab 54. At the same time that the decking slab is formed, the outer edge or curve edge portion 58 thereof is formed and is formed in relation to the decking that the flow opening `60 is created between the gutter 64 and the trough and catch basin.

It is to be appreciated that, by virtue of the bulkheads 182 and 182b, the slab is integrated with the outer corners of the catch basin and trough.

While the form construction has been disclosed in a particular environmental use, namely, in the construction of the catch basin 10 of FIGURES 1 through 4, it is to be understood that the overall form construction or the three form means, namely, the catch basin form means 66, the trough form means 184 and the decking form means 290 may be used independently or may be related in some other manner for forming a different type of catch basin design.

The foregoing is considered as illustrative only of the principles of the invention. Funther, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.

What is claimed as new is as follows:

1. A form construction for use in casting a hollow concrete body having angularly related side walls, said form construction comprising an outer form means and an inner form means, said outer form means including wall forming panels, means removably attached to the outer surfaces of the panels and releasably interconnected to releasably interconnect said panels in fixed angular relationship in accordance with the cross-sectional configuration of the concrete body, said inner form means including wall forming panels, means removably mounted on the inner surfaces of the panels of the inner form means and releasably interconnected to releasably interconnect the panels in fixed angular relationship in accordance with the cross-sectional configuration of the concrete body, means positively laterally spacing said inner form means and outer form means laterally apart with the space between the inner surfaces of the panels of the outer form means and the outer surfaces of the panels of the inner form means being adapted to be filled with cementitious material out of contact with the laterally spacing means, said inner form means and outer form means being vertically orientated and the wall forming panels of each means having upper edge portions and said laterally spacing means being releasably structurally associated with the upper edge portions of the panels, said means releasably interconnecting the wall forming panels of the inner form means including socket means provided at the angular junctures between the panels and means carried by the inner surfaces of the panels and disposed horizontally thereof and having ends removably seated in said socket means, and juncture elements interposed vertically between the adjoining angularly related vertical edges of adjoining inner wall forming panels, said socket means being provided on said elements, said juncture elements having angularly related sides having inner faces and said socket means including plates vertically orientated on the inner faces and having lower end portions fixedly superimposed on the inner faces and upper end portions spaced outwardly from and disposed parallel with the inner faces.

2. The invention of claim 1, wherein said juncture elements are tubular.

3. The invention of claim 1, wherein said means carried by the inner surfaces of inner panels includes bars disposed transversely of the panels and positioned substantially horizontally with respect thereto, means releasably fastening said bars to the panels, said bars having free ends seated on the xed lower end portions of the plates behind the upper end portions of the plates.

4. The invention of claim 3, wherein said bars have lateral outwardly projecting flanges disposed in overlapping relation at the seated ends of the bars.

S. The invention of claim 1, wherein each wall forming panel of the outer form means is composed of separable sections disposed in side by side abutting relation and said sections having upper coplanar edges and removable means fitted over the upper edges and spanning the juncture points between the sections.

6. The invention of claim 5, wherein said last means includes resilient clips.

7. A form construction for use in casting a hollow concrete body having angularly related side walls, said form construction comprising an outer form means and an inner form means, said outer` form means including wall forming panels, means removably attached to the outer surfaces of the panels and releasably interconnected to releasably interconnect said panels in fixed angular relationship in accordance with the cross-sectional configuration of the concrete body, said inner form means including wall forming panels, means removably mounted on the inner surfaces of the panels of the inner form means and releasably interconnected to releasably nterconnect the panels in fixed angular relationship in accordance with the cross-sectional configuration of the concrete body, means positively laterally spacing said inner form means and outer form means laterally apart with the space between the inner surfaces of the panels of the outer form means and the outer surfaces of the panels of the inner form means being adapted to be filled with cementitious material out of contact with the laterally spacing means, said inner form means and outer form means 'being vertically orientated and the wall forming panels of each means having upper edge portions and said laterally spacing means being releasably structurally associated with the upper edge portions of the panels, the wall forming panels of the outer form means having lower edges adapted to rest on a ground surface, said wall forming panels of the inner form means having lower coplanar edges and blocks resting on the ground surface and on which the lower edges of the panels of the inner form seat so that the lower end of the inner form means 1s disposed above the ground supported lower end of the outer form means whereby a space to 'be filled with cementitious material is created at the lower end so as to form a base for the concrete body.

8. The invention of claim 16, wherein said concrete body constitutes a catch basin and means is provided and anchored in the ground for supporting the outer form means, said last-named supporting means including means positively engaging the outer surfaces of the lower edge portions of the panels and stakes driven into the ground and holding said means in engagement with the outer surfaces of said lower edge portions.

9. A form construction for use in casting with a cementitious material a catch basin having a trough-like wing communicating with the upper end of the catch lbasin through one Wall thereof and a slab overlying the catch basin and wing and forming a top wall therefor and the catch basin and wing having an outer gutter edge portion detining an inflow opening therefor from a pavement; said form construction comprising a first form means for use in casting the catch basin, said first form means including inner and outer vertically orientated forms positioned vertically in a ground opening, means retaining said inner and outer forms in` fixed laterally spaced relation to create therebetween a space to be filled with cementitious material so as to form the vertical wall structure of the catch basin, said first form means having means preventing the flow of the cementitious material into the upper portion of a part of the wall structure so as to create an opening in the wall structure, said form construction comprising a second form means for use in casting the trough-like wing and including a channel-like form disposed in a slanted ground ditch communicating with the wall opening and extending thereinto and filling the entire opening, wall means vertically anchored in the ground ditch and spaced laterally therefrom to establish a space to be filled with cementitious material so as to form the end and side walls of the trough-like wing and said form construction comprising a third form means including a plate of a planar outline corresponding to the cross-sectional shape of the cornbined catch basin and trough-like wing and means supported by the poured and set Wing and the catch basin for supporting the plate in a position overlying the catch basin and wing and below the ground level and said plate having an upper surface onto which the cementitious material is poured to form the slab.

10. The invention of claim 9, wherein means is carried by the inner form of the first form means for supporting the ends of pipes with the pipes extending through the space between the forms so as to be anchored in the poured wall structure.

11. The invention of claim 9, wherein form means is provided in association with the third form means for spacing the poured slab from the pavement and forming the gutter edge portion on the slab.

12. The invention of claim 9, wherein said channellike form is formed in longitudinal sections and means for releasably locking said sections together.

13. The invention of claim 9, wherein means is provided for suspending the channel-like form on and within the wall means.

14. The invention of claim 9, wherein said wall structure of the catch basin is formed with vertically spaced rungs and said means supporting the plate includes means detachably anchored to one of the rungs and a framework supported by said last means and detachably underlying the plate.

15. The invention of claim 1, wherein said means releasably interconnecting the wall forming panels of the outer form means includes angle irons transversely disposed in substantially horizontal positions on the panels, said angle irons having vertical flanges removably fastened to the wall forming panels and horizontal anges projecting outwardly from the wall forming panels, the horizontal flanges of angle irons on adjoining wall forming panels having complemental end portions projecting beyond the panels and disposed in overlapping structural relationship and means structurally carried by the overlapping end portions for releasably interlocking the end portions.

16. The invention of claim 15, wherein said interlocking means includes a plurality of fixed upstanding pins on the end portions of the horizontal anges, said pins being disposed in spaced fashion along the length of the end portion and the overlapping end portion of the horizontal ange of an adjoining angle iron being formed with a lengthwise spaced series of apertures for selectively receiving the pins.

17. A form construction for use in casting a hollow concrete body having angularly related side walls, said form construction comprising an outer form means and and inner form means, said outer form means including wall forming panels, means attached to the outer surfaces of the panels and releasably interconnected to releasably interconnect said panels in xed angular relationship in accordance with the cross-sectional configuration of the concrete body, said inner form means including wall forming panels, means mounted on the inner surfaces of the panels of the inner form means and releasably interconnected to releasably interconnect the panels in fixed angular relationship in accordance with the crosssectional configuration of the concrete body, means laterally spacing said inner form means and outer form means laterally apart with the space between the inner surfaces of the panels of the outer form means and the outer surfaces of the panels of the inner form means being adapted to be filled with cementitious material, said inner form means and Outer form means being vertically orientated and the wall forming panels of each means having upper edge portions, said means releasably interconnecting the wall forming panels of the inner form means including socket means provided at the angular junctures between the panels and means carried by the inner surfaces of the panels and disposed horizontally thereof and having ends removably seated in said socket means, and juncture elements interposed vertically between the adjoining angularly related vertical edges of adjoining inner wall forming panels, said socket means being provided on said elements, said juncture elements having angularly related sides having inner faces and said socket means including plates vertically orientated on the inner faces and having lower end portions iXedly superimposed on the inner faces and upper end portions spaced outwardly from and disposed parallel with the inner faces.

18. 'The invention of claim 17 wherein said lateral spacing means includes rod members iitted laterally between the upper edge portions of the panels of the inner and outer form means, said upper edge portions of the wall forming panels of the outer form having free upper edges, said rod members having hook means on one end thereof engaged over the free upper edges of the outer wall forming panels, and abutting heads on the opposite ends thereof engaged against the inner wall forming panels to define a predetermined lateral space between the inner and outer panels.

References Cited UNITED STATES PATENTS 1,014,360 1/1912 A1166 249-149 1,202,269 10/1916 Cramer 249-4X 1,220,083 3/1917 Fous@ 249-48 2,189,872 2/1940 Ulrich 25-131 X 2,581,403 1/1952 Gabrielson 249-219 X 2,650,411 9/1953 Mitcheu 249-96 X 2,794,235 6/1957 Hinberg 249-194 992,782 5/1911 Lambie.

I. SPENCER OVERHOLSER, Primaly Examiner.

DE WALDEN W. JONES, Assistant Examiner.

U.S. Cl. XR. 

